WebKit encountered an internal error (Running localhost web server on iOS Simular's Safari)

Running a web server on localhost is breaking on the iOS Simulator. It is also blocking me from testing my mobile application.

Full Log:

-------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Incident Identifier: 79694C62-168B-4EAE-B929-D5328B90E654
CrashReporter Key:   1032EC0D-AECB-8108-AECA-E5D59E38FB9F
Hardware Model:      Mac14,6
Process:             com.apple.WebKit.Networking [92246]
Path:                /Volumes/VOLUME/*/com.apple.WebKit.Networking
Identifier:          com.apple.WebKit.Networking
Version:             8619.1.26.30.5
Code Type:           ARM-64 (Native)
Role:                Foreground
Parent Process:      launchd_sim [66084]
Coalition:           com.apple.CoreSimulator.SimDevice.7CFB7CF8-19CA-494C-B926-0F3EDFBD1EA4 [269430]
Responsible Process: SimulatorTrampoline [13856]

Date/Time:           2024-10-06 12:43:01.0345 -0700
Launch Time:         2024-10-06 11:47:34.9799 -0700
OS Version:          macOS 14.6.1 (23G93)
Release Type:        User
Report Version:      104

Exception Type:  EXC_BAD_ACCESS (SIGKILL)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000beaddcbda4b0 -> 0x00003eaddcbda4b0 (possible pointer authentication failure)
Exception Codes: 0x0000000000000001, 0x0000beaddcbda4b0
VM Region Info: 0x3eaddcbda4b0 is not in any region.  Bytes after previous region: 68435417343153  Bytes before following region: 36636662586192
      REGION TYPE                    START - END         [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      commpage (reserved)        1000000000-7000000000   [384.0G] ---/--- SM=NUL  reserved VM address space (unallocated)
--->  GAP OF 0x5f9000000000 BYTES
      MALLOC_NANO              600000000000-600020000000 [512.0M] rw-/rwx SM=PRV  
Termination Reason: PAC_EXCEPTION 1 

Triggered by Thread:  3

Thread 0:: com.apple.NSURLConnectionLoader
0   libsystem_kernel.dylib        	       0x104c49170 mach_msg2_trap + 8
1   libsystem_kernel.dylib        	       0x104c5a660 mach_msg2_internal + 76
2   libsystem_kernel.dylib        	       0x104c51318 mach_msg_overwrite + 532
3   libsystem_kernel.dylib        	       0x104c494e8 mach_msg + 20
4   CoreFoundation                	       0x18041ab60 __CFRunLoopServiceMachPort + 156
5   CoreFoundation                	       0x180415224 __CFRunLoopRun + 1160
6   CoreFoundation                	       0x180414960 CFRunLoopRunSpecific + 536
7   CFNetwork                     	       0x1849b9510 +[__CFN_CoreSchedulingSetRunnable _run:] + 372
8   Foundation                    	       0x180f51d6c __NSThread__start__ + 720
9   libsystem_pthread.dylib       	       0x105293414 _pthread_start + 104
10  libsystem_pthread.dylib       	       0x10528e5e0 thread_start + 8

Thread 1:
0   libsystem_pthread.dylib       	       0x10528e5cc start_wqthread + 0

Thread 2:: JavaScriptCore libpas scavenger
0   libsystem_kernel.dylib        	       0x104c4c670 __psynch_cvwait + 8
1   libsystem_pthread.dylib       	       0x1052939cc _pthread_cond_wait + 1216
2   JavaScriptCore                	       0x1987071e0 scavenger_thread_main + 1148
3   libsystem_pthread.dylib       	       0x105293414 _pthread_start + 104
4   libsystem_pthread.dylib       	       0x10528e5e0 thread_start + 8

Thread 3 Crashed::  Dispatch queue: com.apple.NWURLSession
0   libobjc.A.dylib               	       0x18008df74 objc_autoreleaseReturnValue + 88
1   Network                       	       0x1883e3bc0 -[NWURLErrorUserInfoDictionary objectForKey:] + 112
2   CoreFoundation                	       0x1804b2fc8 -[NSDictionary getObjects:andKeys:count:] + 208
3   CoreFoundation                	       0x180403c8c __NSDictionaryEnumerate + 588
4   CoreFoundation                	       0x1804b4bf8 -[NSDictionary __apply:context:] + 96
5   CoreFoundation                	       0x1803d695c _CFErrorFormatDebugDescriptionAux + 564
6   CoreFoundation                	       0x1803d6ae8 _CFErrorCreateRedactedDescription + 84
7   Foundation                    	       0x180e70638 -[NSError redactedDescription] + 12
8   Foundation                    	       0x180f02794 _NS_os_log_callback + 224
9   libsystem_trace.dylib         	       0x1800a28c8 _os_log_fmt_flatten_NSCF + 60
10  libsystem_trace.dylib         	       0x1800a2154 _os_log_fmt_flatten_object_impl + 164
11  libsystem_trace.dylib         	       0x1800b1288 _os_log_impl_flatten_and_send + 1892
12  libsystem_trace.dylib         	       0x1800b0b0c _os_log + 164
13  libsystem_trace.dylib         	       0x1800b36d8 _os_log_impl + 20
14  Network                       	       0x1880fd4d8 -[NWURLSessionTask complete] + 700
15  Network                       	       0x1880f8900 -[NWURLSessionTask completeTaskWithError:] + 184
16  Network                       	       0x1880fe7d0 __32-[NWURLSessionTask readResponse]_block_invoke + 456
17  Network                       	       0x18836c158 __31-[NWURLLoaderHTTP readResponse]_block_invoke + 3504
18  libdispatch.dylib             	       0x180188594 _dispatch_block_async_invoke2 + 104
19  libdispatch.dylib             	       0x180178de0 _dispatch_client_callout + 16
20  libdispatch.dylib             	       0x180180f60 _dispatch_lane_serial_drain + 956
21  libdispatch.dylib             	       0x180181a98 _dispatch_lane_invoke + 388
22  libdispatch.dylib             	       0x1801828e4 _dispatch_workloop_invoke + 776
23  libdispatch.dylib             	       0x18018cf44 _dispatch_root_queue_drain_deferred_wlh + 276
24  libdispatch.dylib             	       0x18018c5a0 _dispatch_workloop_worker_thread + 440
25  libsystem_pthread.dylib       	       0x10528f814 _pthread_wqthread + 284
26  libsystem_pthread.dylib       	       0x10528e5d4 start_wqthread + 8

Thread 4:
0   libsystem_pthread.dylib       	       0x10528e5cc start_wqthread + 0


Thread 3 crashed with ARM Thread State (64-bit):
    x0: 0x0000beaddcbda490   x1: 0x0000000000000000   x2: 0x0000000000000003   x3: 0x0000000104cb4b70
    x4: 0x0000000000000004   x5: 0x000000000000001f   x6: 0x000000000000006e   x7: 0x000000000000001b
    x8: 0x0000beaddcbda490   x9: 0x000000016b32b0e0  x10: 0x0f007ffffffffff8  x11: 0x0000000000000007
   x12: 0x0000000000000007  x13: 0x0000600002c027d0  x14: 0x01000001ec0cdd89  x15: 0x00000001ec0cdd88
   x16: 0x000000010528e65c  x17: 0x00000001804da96c  x18: 0x0000000000000000  x19: 0x000060000210a490
   x20: 0x00000001883e3bc0  x21: 0x0000000000000000  x22: 0x0000000105006660  x23: 0x000060000020eb00
   x24: 0x0000000000000006  x25: 0x0000000000000000  x26: 0x000000016b329a36  x27: 0x000000016b328b50
   x28: 0x0000000000000000   fp: 0x000000016b328660   lr: 0x000000018008df5c
    sp: 0x000000016b328640   pc: 0x000000018008df74 cpsr: 0x20001000
   far: 0x0000beaddcbda4b0  esr: 0x92000004 (Data Abort) byte read Translation fault

Binary Images:
       0x104d04000 -        0x104d8ffff dyld (*) <f635824e-318b-3f0c-842c-c369737f2b68> /usr/lib/dyld
       0x104be8000 -        0x104beffff com.apple.WebKit.Networking (*) <6584e9ed-bc7e-37b1-96c6-59660a467da0> /Volumes/VOLUME/*/com.apple.WebKit.Networking
       0x105390000 -        0x1053d3fff dyld_sim (*) <6499b476-4b66-3148-b85b-496aa7ea0690> /Volumes/VOLUME/*/dyld_sim
       0x104cb4000 -        0x104cbbfff libsystem_platform.dylib (*) <3394e9ca-eb51-322d-a5eb-4d895d3b1c14> /usr/lib/system/libsystem_platform.dylib
       0x104c48000 -        0x104c83fff libsystem_kernel.dylib (*) <0f9f96fe-6b1c-3253-a33a-c9e4a0c2a386> /usr/lib/system/libsystem_kernel.dylib
       0x10528c000 -        0x10529bfff libsystem_pthread.dylib (*) <3df3256f-466e-37bc-b995-a5a9956e1415> /usr/lib/system/libsystem_pthread.dylib
       0x18038b000 -        0x18075afff com.apple.CoreFoundation (6.9) <5f40c0e3-6b50-30c6-a686-3ab03c9a5404> /Volumes/VOLUME/*/CoreFoundation.framework/CoreFoundation
       0x1847b2000 -        0x184b30fff com.apple.CFNetwork (1.0) <722d2929-fe22-39d0-81cf-4cf7e2bb9caa> /Volumes/VOLUME/*/CFNetwork.framework/CFNetwork
       0x1807da000 -        0x181420fff com.apple.Foundation (6.9) <1a4bc02e-f4dc-3ab5-9bb7-61d28064ffe8> /Volumes/VOLUME/*/Foundation.framework/Foundation
               0x0 - 0xffffffffffffffff ??? (*) <00000000-0000-0000-0000-000000000000> ???
       0x19715e000 -        0x1988d4fbf com.apple.JavaScriptCore (8619) <6d086b92-41ca-32fd-a496-c208f72ab34b> /Volumes/VOLUME/*/JavaScriptCore.framework/JavaScriptCore
       0x180064000 -        0x18009fda3 libobjc.A.dylib (*) <eea0093e-1937-3650-ac0f-430162fd94d5> /Volumes/VOLUME/*/libobjc.A.dylib
       0x187a43000 -        0x188841fff com.apple.Network (1.0) <8a1425de-91dd-37d4-8c8b-e279159a7155> /Volumes/VOLUME/*/Network.framework/Network
       0x1800a0000 -        0x1800b9fff libsystem_trace.dylib (*) <dd366ca4-ca49-3b37-9b2f-2d37ce5444de> /Volumes/VOLUME/*/libsystem_trace.dylib
       0x180175000 -        0x1801b9fff libdispatch.dylib (*) <71b0ee55-14d3-363f-88de-27caee135593> /Volumes/VOLUME/*/libdispatch.dylib

EOF

-----------
Full Report
-----------

{"app_name":"com.apple.WebKit.Networking","timestamp":"2024-10-06 12:43:02.00 -0700","app_version":"","slice_uuid":"6584e9ed-bc7e-37b1-96c6-59660a467da0","build_version":"8619.1.26.30.5","platform":7,"bundleID":"com.apple.WebKit.Networking","share_with_app_devs":1,"is_first_party":1,"bug_type":"309","os_version":"macOS 14.6.1 (23G93)","roots_installed":0,"name":"com.apple.WebKit.Networking","incident_id":"79694C62-168B-4EAE-B929-D5328B90E654"}
{
  "uptime" : 2200000,
  "procRole" : "Foreground",
  "version" : 2,
  "userID" : 501,
  "deployVersion" : 210,
  "modelCode" : "Mac14,6",
  "coalitionID" : 269430,
  "osVersion" : {
    "train" : "macOS 14.6.1",
    "build" : "23G93",
    "releaseType" : "User"
  },
  "captureTime" : "2024-10-06 12:43:01.0345 -0700",
  "codeSigningMonitor" : 1,
  "incident" : "79694C62-168B-4EAE-B929-D5328B90E654",
  "pid" : 92246,
  "translated" : false,
  "cpuType" : "ARM-64",
  "roots_installed" : 0,
  "bug_type" : "309",
  "procLaunch" : "2024-10-06 11:47:34.9799 -0700",
  "procStartAbsTime" : 54250015361861,
  "procExitAbsTime" : 54329840668912,
  "procName" : "com.apple.WebKit.Networking",
  "procPath" : "\/Volumes\/VOLUME\/*\/com.apple.WebKit.Networking",
  "bundleInfo" : {"CFBundleVersion":"8619.1.26.30.5","CFBundleIdentifier":"com.apple.WebKit.Networking"},
  "parentProc" : "launchd_sim",
  "parentPid" : 66084,
  "coalitionName" : "com.apple.CoreSimulator.SimDevice.7CFB7CF8-19CA-494C-B926-0F3EDFBD1EA4",
  "crashReporterKey" : "1032EC0D-AECB-8108-AECA-E5D59E38FB9F",
  "responsiblePid" : 13856,
  "responsibleProc" : "SimulatorTrampoline",
  "codeSigningID" : "com.apple.WebKit.Networking",
  "codeSigningTeamID" : "",
  "codeSigningFlags" : 570442241,
  "codeSigningValidationCategory" : 1,
  "codeSigningTrustLevel" : 4294967295,
  "instructionByteStream" : {"beforePC":"IAcAVOEDAKrgAxWqsfT\/l38CAPGtAwBU6q99sgrg4fJoAkD5AM19kg==","atPC":"CBBA+QkBCoopAUC56wMJqskAADcLAED5a819kmsRQPlqAQqKSwFAuQ=="},
  "wakeTime" : 101408,
  "sleepWakeUUID" : "9BF3B9FD-8444-4A5A-BF94-E085BAD881E8",
  "sip" : "enabled",
  "vmRegionInfo" : "0x3eaddcbda4b0 is not in any region.  Bytes after previous region: 68435417343153  Bytes before following region: 36636662586192\n      REGION TYPE                    START - END         [ VSIZE] PRT\/MAX SHRMOD  REGION DETAIL\n      commpage (reserved)        1000000000-7000000000   [384.0G] ---\/--- SM=NUL  reserved VM address space (unallocated)\n--->  GAP OF 0x5f9000000000 BYTES\n      MALLOC_NANO              600000000000-600020000000 [512.0M] rw-\/rwx SM=PRV  ",
  "exception" : {"codes":"0x0000000000000001, 0x0000beaddcbda4b0","rawCodes":[1,209653942035632],"type":"EXC_BAD_ACCESS","signal":"SIGKILL","subtype":"KERN_INVALID_ADDRESS at 0x0000beaddcbda4b0 -> 0x00003eaddcbda4b0 (possible pointer authentication failure)"},
  "termination" : {"namespace":"PAC_EXCEPTION","flags":2,"code":1},
  "vmregioninfo" : "0x3eaddcbda4b0 is not in any region.  Bytes after previous region: 68435417343153  Bytes before following region: 36636662586192\n      REGION TYPE                    START - END         [ VSIZE] PRT\/MAX SHRMOD  REGION DETAIL\n      commpage (reserved)        1000000000-7000000000   [384.0G] ---\/--- SM=NUL  reserved VM address space (unallocated)\n--->  GAP OF 0x5f9000000000 BYTES\n      MALLOC_NANO              600000000000-600020000000 [512.0M] rw-\/rwx SM=PRV  ",
  "extMods" : {"caller":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"system":{"thread_create":0,"thread_set_state":35,"task_for_pid":18},"targeted":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"warnings":0},
  "faultingThread" : 3,
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  "usedImages" : [
  {
    "source" : "P",
    "arch" : "arm64e",
    "base" : 4375724032,
    "size" : 573440,
    "uuid" : "f635824e-318b-3f0c-842c-c369737f2b68",
    "path" : "\/usr\/lib\/dyld",
    "name" : "dyld"
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  {
    "source" : "P",
    "arch" : "arm64",
    "base" : 4374560768,
    "CFBundleIdentifier" : "com.apple.WebKit.Networking",
    "size" : 32768,
    "uuid" : "6584e9ed-bc7e-37b1-96c6-59660a467da0",
    "path" : "\/Volumes\/VOLUME\/*\/com.apple.WebKit.Networking",
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The same happening to me as well. Working fine on iOS 17.5 but not on iOS 18. Refer the below screen shot for iOS 18, whenever i try to hit the local in iOS 18 i gets the error popup saying - Webkit.Networking quit unexpectedly.

Localhost connections are completely erroring on the latest iOS version 18.0

Can someone please help?

Experiencing the same. Any solutions?

No Solution yet, facing the same issue with latest iOS 18.1 Simulators as well

I am having the same issue. I can't test my app.

@D4v3m @roomba.friend A temporary solution is to create a new iOS simulator from x-code using iOS 17.5 SDK. Localhost is working fine the iOS versions below iOS 18.0.

Hi Support team,

There is any update about it this?

In iOS simulator with iOS 18.0,18.1, 18.2 is not working. You have any estimation to fix it? In iOS 17.5 is working perfectly.

Thanks in advance Regards

WebKit encountered an internal error (Running localhost web server on iOS Simular's Safari)
 
 
Q